---
name: "pskc_set_key_algparm_resp_checkdigits"
section: "3"
platform: "linux"
package: "oath-toolkit"
version: "2.6.15-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/pskc_set_key_algparm_resp_checkdigits"
---

# pskc\_set\_key\_algparm\_resp\_checkdigits(3)

API function

## NAME

pskc\_set\_key\_algparm\_resp\_checkdigits - API function

## SYNOPSIS

**#include \<pskc.h\>**

**void pskc\_set\_key\_algparm\_resp\_checkdigits(pskc\_key\_t \*** *key***, int** *checkdigit***);**

## ARGUMENTS

- pskc\_key\_t \* key

  a **pskc\_key\_t** handle, from **pskc\_get\_keypackage()**.

- int checkdigit

  non-zero to indicate setting true CheckDigit, 0 otherwise.

## DESCRIPTION

Set the PSKC KeyPackage Key AlgorithmParameters ResponseFormat CheckDigits value.  This attribute indicates whether the device needs to append a Luhn check digit, as defined in \[ISOIEC7812\], to the response.  This is only valid if the 'Encoding' attribute is set to 'DECIMAL'.  If the value is TRUE, then the device will append a Luhn check digit to the response.  If the value is FALSE, then the device will not append a Luhn check digit to the response.

## SINCE

2\.2.0

## REPORTING BUGS

Report bugs to \<oath-toolkit-help@nongnu.org\>. libpskc home page: https://oath-toolkit.codeberg.page/ General help using GNU software: http://www.gnu.org/gethelp/

## COPYRIGHT

Copyright © 2009-2026 Simon Josefsson.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.